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Old 23rd February 2009, 12:57 PM   #11
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Default Re: Silverflute port size suggestions

Quote:
Originally posted by mcmahon48
I am going to be using 2 silver flute of the 4 ohm version in parallel in separate cabinet comparment in a tmtm configuration using
Vifa XT25TG30-04 1" Ring Radiator Tweeter and a bose tweeter
I would appreciate any information you can give
enclosed cabinet size w 26.4 cm x H 16.5 cm x d 15.25 cm
xover 3k , 12k

Hi,

Do you realize that if you parallel 2-4ohms speakers , they become 2 ohms. Do you realize that 99% of all home audio amps will not be happy with that load?
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Old 23rd February 2009, 08:02 PM   #12
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Wink yes I am aware of the parallel resisitance

I will be using load resistors in the crossover design to stable the impedance to the amplifier I am aiming at 6 ohm to 12 ohms range for the speaker system. Main impedance will be around 6.8 ohms
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Old 23rd February 2009, 11:32 PM   #13
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So the paralleled silver flutes are going to be designated as midrange in a 3 way system , Right?
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Old 23rd February 2009, 11:35 PM   #14
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Default LR2 2 way

a two way system
LR2 crossover
send me your email and I will send a picture of the crossover design
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Old 23rd February 2009, 11:39 PM   #15
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message sent.
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Old 24th February 2009, 12:03 AM   #16
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Default the silver flutes and tweeters

The two silver flutes will handle the FR from 40hz to 3khz
bose tweeter 3000 to 12k or to 15 khz
I need to test the bose and other tweeter I have and that is why I am trying find help with Speaker workshop.
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Old 24th February 2009, 12:36 AM   #17
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Thanks for the email,

But I think it is not a good idea to put a series resistor on woofers that operate from 40hz up, If you want to lower the sensitivity of the woofer , connecting them in series is a better way of doing it, Plus the 2- 4 ohms woofer will present 8ohms load to the amp and increase the sensitivity to 3db compared to a single woofer.
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Old 24th February 2009, 12:45 AM   #18
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I addition to this, If you are worried that the bose driver might not have enough sensitivity to cope up with the woofers, just remember that when you put it in a second order xo system there is this thing called bandpass gain, For 2nd order xo the bandpass gain will be aprox. 2db. So there could be potentially 2db added to the sensitivity of the bose drivers.
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Old 24th February 2009, 04:22 AM   #19
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Default Re: the silver flutes and tweeters

Hi,

Quote:
Originally posted by mcmahon48
The two silver flutes will handle the FR from 40hz to 3khz
bose tweeter 3000 to 12k or to 15 khz
I need to test the bose and other tweeter I have and that is why I am trying find help with Speaker workshop.

I like crossing the SF at 1.5K or lower.

I tried one at 1.5K, another at 900 and the one I have now are at 600.

The 600 and 900 are indistinguishable and at 1.5K, it depends on what you're using for a tweeter.

Cheers!
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Old 24th February 2009, 11:52 AM   #20
sreten is offline sreten  United Kingdom
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Default Re: yes I am aware of the parallel resisitance

Quote:
Originally posted by mcmahon48

I will be using load resistors in the crossover design to stable the
impedance to the amplifier I am aiming at 6 ohm to 12 ohms range
for the speaker system. Main impedance will be around 6.8 ohms

Hi,

No offence intended, but the above appears clueless regarding
using two 4 ohm drivers in parallel. I more than suspect your
crossover design is wrong, the MTMT idea has me baffled, why ?

/sreten.
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